In the steady state, cardiac output equals. venous return. Factors that cause hypereffective heart. Sympathetic stimulation can increase the effectiveness of the heart via: (2) increasing the strength of heart contraction. Factors that can cause a hypoeffective heart: (1) coronary artery blockage.
Thursday, March 19, 2015 - 11:09. Ed Sheeran has added yet another amazing accolade to his collection with the news that his global smash hit sophomore album X has hit the 2 million sales mark, joining a select band of chosen superstars to hit the same achievement.
Metallica's mega-selling self-titled 1991 album has hit a new sales threshold. The album, which continues to be the best-selling release of the Nielsen SoundScan era, has become the first album to sell 16 million copies since SoundScan started tracking sales in 1991.